Ownership Submission
FORM 3
 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number: 3235-0104
Expires: January 31, 2005
Estimated average burden hours per response... 0.5

(Print or Type Responses)
1. Name and Address of Reporting Person *
  Zemba Douglas D.
 2. Date of Event Requiring Statement (Month/Day/Year)
07/12/2018		 3. Issuer Name and Ticker or Trading Symbol
ExOne Co [XONE]
(Last)
(First)
(Middle)
127 INDUSTRY BOULEVARD		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
CFO & Treasurer
 5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

NORTH HUNTINGDON, PA 15642		 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security
(Instr. 4)		 2. Amount of Securities Beneficially Owned
(Instr. 4)		 3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)		 4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Common Stock 8,834
D
 

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)		 2. Date Exercisable and Expiration Date
(Month/Day/Year)		 3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)		 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)		 6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Stock Option (right to buy) 02/10/2017 02/10/2027 Common Stock 12,000 $ 10.1 D  
Stock Option (right to buy)   (1) 08/14/2022 Common Stock 25,000 $ 7.91 D  
Stock Option (right to buy)   (2) 02/07/2023 Common Stock 6,667 $ 18 D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Zemba Douglas D.
127 INDUSTRY BOULEVARD
NORTH HUNTINGDON, PA 15642		       CFO & Treasurer  

Signatures

/s/ Loretta L. Benec, attorney-in-fact for Douglas D. Zemba 07/23/2018
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) The original option grant for 25,000 shares vested with respect to 12,500 shares on August 14, 2017 and will vest with respect to the remaining 12,500 shares on August 14, 2018.
(2) The original option grant for 10,000 shares vested with respect to 3,333 shares on February 7, 2014, an additional 3,333 shares on February 7, 2015 and the remaining 3,334 shares on February 7, 2016.
 
Remarks:
See attached Exhibit 24 (Power of Attorney).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, See Instruction 6 for procedure.

Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB number.